#187: 3GP/MP4 performance regression -------------------------------------+------------------------------------- Reporter: jsd | Owner: Type: defect | Status: reopened Priority: normal | Component: Version: unspecified | undetermined Keywords: mov | Resolution: Blocking: | Blocked By: Analyzed by developer: 0 | Reproduced by developer: 0 -------------------------------------+------------------------------------- Changes (by lars): * status: closed => reopened * resolution: worksforme => Comment: I guess I have the same problem: When I run below ffmpeg command it takes very long time and the output file is about 10 times bigger. If I provide the frame rate parameter -r it works well (small file, fast transcoding). What is the problem and how can I solve it? I don't want to set a fixed frame rate because I guess it's better to leave it the same as source, isn't it?. Maybe the problem is something else, because I found many examples in web where the -r option isn't used. Also transcoding to a different format or with a different source works well without -r option (I tried with ffmpeg 0.7.15 and also 1.2.1). The videos are provided by the users of my website and automatically converted to be suitable for the web. So I need the most general command for automatic conversion. In the following ffmpeg output you will find this two suspicious messages: * Frame rate very high for a muxer not effciciently supporting it. Please consider specifiying a lower framerate, a different muxer or -vsync 2 * MB rate (36000000) > level limit (983040) '''ffmpeg command + log':'' ffmpeg -i '/tmp/standort_aquarium.mp4' -vcodec libx264 output.mp4 ffmpeg version 0.7.15, Copyright (c) 2000-2013 the FFmpeg developers built on Feb 22 2013 07:18:58 with gcc 4.4.5 configuration: --enable- libdc1394 --prefix=/usr --extra-cflags='-Wall -g ' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore- amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-avfilter --enable-libdirac --disable-decoder=libdirac --enable-libfreetype --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-libvpx --enable-librtmp --extra-libs=-lgcrypt --disable-altivec --disable-armv5te --disable-armv6 --disable-vis libavutil 50. 43. 0 / 50. 43. 0 libavcodec 52.123. 0 / 52.123. 0 libavformat 52.111. 0 / 52.111. 0 libavdevice 52. 5. 0 / 52. 5. 0 libavfilter 1. 80. 0 / 1. 80. 0 libswscale 0. 14. 1 / 0. 14. 1 libpostproc 51. 2. 0 / 51. 2. 0 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/standort_aquarium.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp423gp4isom creation_time : 2013-04-19 15:04:05 Duration: 00:00:18.24, start: 0.000000, bitrate: 2095 kb/s Stream #0.0(und): Video: mpeg4, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 2001 kb/s, 14.97 fps, 30k tbr, 30k tbn, 30k tbc Metadata: creation_time : 2013-04-19 15:04:05 Stream #0.1(und): Audio: aac, 48000 Hz, mono, s16, 96 kb/s Metadata: creation_time : 2013-04-19 15:04:05 File 'output.mp4' already exists. Overwrite ? [y/N] y [mp4 @ 0x20eed80] Frame rate very high for a muxer not effciciently supporting it. Please consider specifiying a lower framerate, a different muxer or -vsync 2 [buffer @ 0x20f8820] w:640 h:480 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param: [libx264 @ 0x20efde0] Default settings detected, using medium profile [libx264 @ 0x20efde0] using SAR=1/1 [libx264 @ 0x20efde0] MB rate (36000000) > level limit (983040) [libx264 @ 0x20efde0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 [libx264 @ 0x20efde0] profile High, level 5.1 [libx264 @ 0x20efde0] 264 - core 118 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'output.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp423gp4isom creation_time : 2013-04-19 15:04:05 encoder : Lavf52.111.0 Stream #0.0(und): Video: libx264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 30k tbn, 30k tbc Metadata: creation_time : 2013-04-19 15:04:05 Stream #0.1(und): Audio: libfaac, 48000 Hz, mono, s16, 64 kb/s Metadata: creation_time : 2013-04-19 15:04:05 Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop, [?] for help frame=542630 fps=132 q=33.0 Lsize= 77226kB time=00:00:18.08 bitrate=34976.2kbits/s dup=542358 drop=0 video:68604kB audio:143kB global headers:0kB muxing overhead 12.333275% frame I:2174 Avg QP:18.72 size: 25040 [libx264 @ 0x20efde0] frame P:136846 Avg QP:25.27 size: 56 [libx264 @ 0x20efde0] frame B:403610 Avg QP:32.99 size: 20 [libx264 @ 0x20efde0] consecutive B-frames: 0.8% 0.0% 0.1% 99.1% [libx264 @ 0x20efde0] mb I I16..4: 5.5% 83.3% 11.1% [libx264 @ 0x20efde0] mb P I16..4: 0.0% 0.0% 0.0% P16..4: 0.5% 0.0% 0.0% 0.0% 0.0% skip:99.4% [libx264 @ 0x20efde0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.0% 0.0% 0.0% direct: 0.0% skip:100.0% L0:21.2% L1:78.8% BI: 0.0% [libx264 @ 0x20efde0] 8x8 transform intra:83.1% inter:85.2% [libx264 @ 0x20efde0] coded y,uvDC,uvAC intra: 91.2% 95.8% 80.7% inter: 0.0% 0.1% 0.0% [libx264 @ 0x20efde0] i16 v,h,dc,p: 13% 40% 12% 35% [libx264 @ 0x20efde0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 34% 15% 4% 4% 5% 6% 7% 8% [libx264 @ 0x20efde0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 38% 6% 4% 6% 6% 8% 6% 6% [libx264 @ 0x20efde0] i8c dc,h,v,p: 39% 32% 19% 10% [libx264 @ 0x20efde0] Weighted P-Frames: Y:0.0% UV:0.0% [libx264 @ 0x20efde0] ref P L0: 91.5% 5.2% 2.8% 0.4% 0.0% [libx264 @ 0x20efde0] ref B L0: 55.7% 43.5% 0.8% [libx264 @ 0x20efde0] ref B L1: 97.9% 2.1% [libx264 @ 0x20efde0] kb/s:31071.04 see: http://stackoverflow.com/questions/16818930/problems-with-frame-rate- on-video-conversion-using-ffmpeg-with-libx264?noredirect=1 The video source is temporarily available under: https://www.dropbox.com/s/4xg147z77u40g87/standort_aquarium.mp4 -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/187#comment:10> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker